Question about 1997 Pontiac Grand Prix
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
SOURCE: no acceleration
I had the same problem with one exception. It would rev higher than 3500 but the higher it revved the more it bogged. I had the catalytic converter replaced. I thought I bought a new car. Acceleration is just like new. It was easy enough to test. My mechanic cut a hole in the exhaust pipe in front of the catalytic converter. It sounded like a truck but the acceleration difference was immediate. Easy diagnosis.
The car is hard to shift because the more you press on the accelerator the more the computer for the transmission won't let it shift. Which in turn causes the car to bog more sending more unburned fuel into the catalytic converter. Which in turn causes more carbon build up and more back pressure. Vicious cycle. It will only get worse.
My thermostat caused the entire problem. Thermostat was stuck open, engine never got to operating temp most days. Car burned rich. Bad gas mileage. A lot of unspent fuel being dumped into the converter. Probably have some underlying cause that needs to be addressed. Bad plugs, wires, coil, fuel filter.
Posted on Jan 21, 2009
Tips for a great answer:
Mar 02, 2015 | Pontiac Cars & Trucks
Sep 04, 2014 | Cars & Trucks
May 28, 2013 | 1998 Pontiac Grand Prix
Jul 27, 2012 | 1998 Pontiac Grand Prix
Aug 10, 2010 | 1997 Pontiac Grand Prix
Feb 21, 2010 | 1997 Pontiac Grand Prix
Jan 29, 2010 | 1998 Pontiac Grand Prix
Jul 19, 2009 | 1999 Pontiac Grand Prix
45 people viewed this question
Usually answered in minutes!